Fix typo in inline comments

includes/validation/class-amp-validation-error-taxonomy.php

@@ -2931,7 +2931,7 @@ public static function handle_validation_error_update( $redirect_to, $action, $t
 			add_filter( 'pre_term_description', 'wp_filter_kses', $has_pre_term_description_filter );
 		}
 
-		// Bail if redirect_is passed as null.
+		// Bail if `$redirect_to` is passed as null.
 		if ( null === $redirect_to ) {
 			return $redirect_to;
 		}